docs: replace mobile-unfriendly Mermaid and text art with SVG walkthroughs

README.ko.md

@@ -70,6 +70,12 @@ $ hanfix dkssudgktpdy
 
 ![hanfix demo](assets/demo.gif)
 
+## 동작 과정 한눈에 보기
+
+![한글 자판으로 잘못 입력한 ㅣㄴ -ㅁ 명령을 hf 또는 ㅗㄹ로 ls -a로 복구하고, Enter 실행 또는 Ctrl+C 취소를 선택하는 터미널 모의 그림](assets/keyboard-recovery-ko.svg)
+
+[그림을 크게 보기](assets/keyboard-recovery-ko.svg) · **설명용 모의 화면**이며 실제 실행 화면을 촬영한 것은 아닙니다. `hf`는 키 입력을 감시하지 않고 셸의 직전 명령 기록을 읽습니다.
+
 ```console
 $ ㅣㄴ -ㅁ
 bash: ㅣㄴ: command not found

README.md

@@ -92,35 +92,9 @@ you press Enter. It works on Linux, macOS and Windows, with bash, zsh, fish and
 
 ## How the correction works
 
-The following is an **illustrative terminal interaction**, not a screenshot or a recorded run. `hf` reads the previous command from your shell history; it does not monitor your keystrokes.
-
-```text
-  Korean keyboard layout is still active
-  ┌───────────────────────────────────────┐
-  │ $ ㅣㄴ -ㅁ                              │
-  │ bash: ㅣㄴ: command not found           │
-  └───────────────────────────────────────┘
-                    │
-                    ▼
-  ┌───────────────────────────────────────┐
-  │ $ ㅗㄹ                                  │
-  │ ls -a           [Enter / Ctrl+C]      │
-  └───────────────────────────────────────┘
-            │                   │
-         Enter                Ctrl+C
-            ▼                   ▼
-      Run corrected        Cancel without
-      command              running it
-```
+![Mobile-friendly mock terminal: a mistyped Korean-layout command is recovered as ls -a, then Enter executes or Ctrl+C cancels.](assets/keyboard-recovery-en.svg)
 
-```mermaid
-flowchart LR
-    A["Previous shell command"] --> B["hf / ㅗㄹ"]
-    B --> C["Map Korean 2-set keys to QWERTY"]
-    C --> D{"Confirm?"}
-    D -->|Enter| E["Execute corrected command"]
-    D -->|Ctrl+C| F["Cancel"]
-```
+[View the full-size diagram](assets/keyboard-recovery-en.svg). This is a **mock terminal**, not a screenshot or recorded run. `hf` reads the previous command from your shell history; it does not monitor keystrokes.
 
 **Important:** `hf -y` skips confirmation. Use the normal `hf` first when the corrected command could modify files.